Air-blower



W. P. DENTON.

AIR BLOWER.

APPLICATION FILED JULY 1, I919.

Patented Mar. 9, 1920.

UNITED STATES PATENT ornron. WILLIAM P. DENTON, OF SOUTH MELBOURNE, VICTORIA, AUSTRALIA, ASSIGNOR OF ONE- THIRD TO GEORGE WALTER LONG AND ONE-THIRD TO GEORGE OLIVER LONG, OF

SOUTH MELBOURNE, AUSTRALIA.

' AIB-BLOWER.

Patented Mar. 9, 1920.

Application filed July 7, 1919. Serial No. 309,057.

To all whom it may concern:

Be it known that 1, WILLIAM PATOHETT DnN'roN, residing at South Melbourne, in the State of Victoria, Commonwealth of Australia, a subject of the King of Great Britain, have invented certain new and useful Im- Erovements in and Connected with Airlowers', of which the following is a specification. v

This invention has reference to the construction of air blowers of the centrifugal type used for ventilating, forge work and other purposes where the movement of large volumes of air is required.

In constructions hltherto employed, rotor blades have been made in such a way that the ressure of air upon the whole widthof the lade has not been approximately uniform, with the consequent result that eddying is set up in the discharge and the velocity of same is impaired.

I propose, in this invention, to attempt to remedy these defects, and by a special construction of rotor blade to insure that a more even pressure of air will be maintained upon the whole length of blade of the driven rotor. Accordingly, I construct rotor blades with a middle part about the same width as at present obtains in this class of machinery but with the width expanding slightly to ward each end of the blade, the expansion toward the front or air intake end being slightly greater than toward the other end.

Further details of contruction are hereinafter referred to and with reference to the accompanying drawings, in which, Figure 1 is a perspective view of a blower fitted with the improvements.

Fig. 2 is a like view of a single blade. Fig. 3 shows in front elevation several blades fitted into their supports, and

Fig. 4 is a like view of part of the ring supporting the blade ends.

At the air intake side the support may consist of a ring 9 and at the other 'or rear side, of a plate or another ring and the blades and conneotedto the latter at their middle part, as shown. From the mlddle or narrowest part of the blade the upper edge inclines upward toward each end. The blade is broadest at its front or air intake end and is extended below the flange 8 and curved as shown, the radius of the curve being as reat as possible. The opposite end of the blade is nearly as wide as the front end, but not quite, and its lower edge inclines downwardly from the rear toward the front or curved art at a slight acute angle to the horizonta l.

. By means of this construction the indrawn air is gripped immediately by the somewhat broader end of the blade while the rest of the blade takes on its roper share, thus insuring a full delivery t rough the discharge. The roof of the latter is inclined upwardly from the horizontal at an angle of about 30 degrees and the position of the rotor within its casing relatively to the discharge. opening is such that the said inclined roof tothe dischar e inclines directly toward the rotor axis. A hus, as the rotor is driven the blades will create an approximately equal suction along the full length of same and provide fora steady discharge of the air through the delivery in the blower casing.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. In an air blower, a rotor, blades in the rotor that are narrowest at the middle part and expand in width toward each end, the end adjacent to the air intake being widest and means for supporting the blades in the rotor.

2. In an air blower, a rotor, blades in the rotor that are narrowest at the middle part and expand in width toward each end the front end being widest and the lower edge of each blade inclining downwardly from the rear to the front and means for supporting the blades in the rotor and for driving the same.

3.In an air blower, blades to the rotor that are narrowest at the middle part and expand in width toward each end with a greater width at the front end, rightangularly disposed lugs on each blade end, a mug to whichthe lugs are attached into the rotor, means for supporting the blades in the rotor and meansfor taking air into and for dischar ing it from the blower.

4. 111 an air blower, blades to the rotor that are narrowest at the middle part and expand in width toward'each end and that on the lower edge incline downwardly from the rear to the front ends, means for supporting the blades in the rotor, acasing thereto, an ,air' intake therein and a dis charge therefrom the roof of the discharge inclining upwardly toward the rotor axis.

5. In an air blower, blades to the rotor that are narrowest at the middle part and expand in widthtoward each end and that on the lower edge incline downwardly from the rear to the front ends, means. for supporting the blades in the rotor, a casing thereto, an air intake therein adjacent to the wider ends of the blades and a discharge therefrom that is as wide as the-casing but higher than it is wide and having'ai'ji'oof inclining upwardly toward the rotor axis.

In witness whereof I aflix my si ature.

, 'WILLIAM P. DEN ON. Witness:

P. M. Nnw'roN. 

